The self-powered siren (or self-powered siren with tilt function) is located in the left rear corner of the engine compartment and is attached to the firewall. The siren is only installed in some markets.
Vehicles equipped with a self-powered siren may have a tilt sensor built in that monitors the vehicle's attitude. The CJB monitors the tilt sensor and can detect when the vehicle is being moved, towed or lifted and trigger the alarm. The type of self-powered siren can be identified by the suffix in the part number. Sirens without a tilt sensor have the suffix 'A', while sirens with a tilt sensor have the suffix 'B'.
The siren is controlled by the CJB via the LIN bus. The siren also receives constant power from the battery via the CJB. In the event of an interruption in the battery supply from the CJB, the siren is powered by an internal rechargeable battery.
The article was copied from a resource LRMAN.RU
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